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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0aeba3d0d318a0ad85668184d0f1ce750d31e9a424772d373e0d4261c650795b' 
  AND token = 'V1eqbcAhS7zbYHP00OkkDCzL5aPeUMwHV/x5jnL0XTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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