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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bba6b305ac72389185f2ad5c0557250c3e5bea6a77f0eb6c68621dae20b1bca9' 
  AND token = 'CIpUmnOvZLLJbsgKQqUvMN884v0f3/0RSAc76UuZc4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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