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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7097d5eb50b46d67a069c01865ad48d8f84771337e60abf7bcb8c9abae9f5697' 
  AND token = '4E452SzxuqW8AqA311veYZ/10pmBMXR6jtg46vKNMSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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