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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb70e77eb080a9b70dc4ac32bc32065b97744e08ec82c44f7a01b614130ba719' 
  AND token = '7Sg+LYI/GrFVyHS/8K7mpcDkdJeMmGevtvoyHmegmrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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