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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c3a739d8c13271bea8a4f945ca6faaa97836f85c7cca4e0ac47a70aedc23531' 
  AND token = 'P5ihi4MgmmLwChFM8JPR8cwuIeNppS4AeSCJCGSBEp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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