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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc00661c74740589fc51b6da9bb101e47cd229d4b7806def20f01cc92e61d318' 
  AND token = 'cKZ07fgkPRyP/spSDW1qk+mOwXwNcmcUD8/m+y8cqSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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