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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f4f39c4290e25e21701c38e6d5aec193c08110953ec1f7840913a4e31cc6e69' 
  AND token = 'Q7Z9z44TafPknYnWMNEgxZ0Sqm0Y+qd0Czcr93mPV64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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