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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9285d2a0706f0b50b6e7540edca43d34fafdc491f2fa7510188418c5403d3b17' 
  AND token = 'A45bP6kb3gLztGtwYV0j2WgtsOpzpmKHFKrj5InFiVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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