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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d6c3a8f20885feebed279b4c39e890f7d10e10ebab7df3b9b33f01336f0ae05' 
  AND token = 'dp/j6J9v3c1Y82+/f2+Ea71fG5/822iChARYQ8Zsuwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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