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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce1f6a7ea2e20c9fb1e4049ea8e7d9f77c6c9f2c36e3c1fc6f5e5050c2cc8974' 
  AND token = 'l+US0kANPEjUr05RJ7UzH+nOw3h/AOyV3SqWQCkLnqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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