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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b1f0f2c57213cb1a8fb8dd91fcde0e9d8ff3a0df3e3cd93d355288880260377' 
  AND token = 'qZ0gYBKMNCWtmRwWHjXayaOFDmE5lBU1ceFoG9wThh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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