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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5e75934350dba1064e86a3924fa3e7f6ee2ba961e29c6a14738c4cdd0928dd0' 
  AND token = '/ogppnKGCIx7wk3MhSXdtZVNpTWqekBNmObPCsrTpT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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