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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2753037c09f6ef8a095c08a790477641d6b2cb749b3827e2de777ea9acc206d1' 
  AND token = 'JVy/njtm38BDb8jNv9AfMv/ONIsLEqYaLoZd/rNDP1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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