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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6efd45e38e253c1ee1998665af2f371d95fc2909667ae389719757dae3620405' 
  AND token = 'Tum9numCYHi14PM2RU5csb0Vw7owwdT7HCv04oC/2Dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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