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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f7144956d27229d25f643b67141385b3c2a0cb5e5785169304475b684c2431bd' 
  AND token = 'Wjt5WmixysXsNUPYdCZmsFpTIMQ6eEMYWYvC2I86WuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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