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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32058e10b69c17c5f1032959fc812d1d79395f01103ffee45e0fc674802d2abd' 
  AND token = 'UlgdEU8V8OO1DZ2gevp+z4eLR9nN4XH1CITA0kwp/Wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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