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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ea9531fcedd03eca40ac00131ddbfded5457a7734a18177bd6f20d17a4b6d8c' 
  AND token = 'bqmE83vr9feMzDe5ThT3LrvqYF4xGCltGh46XahQM7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}