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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb2628250a6a0010af25f8e7da9ab95924eaae48c20a738bad3ed31ab18bc69c' 
  AND token = 'F7oWJKEKoL1aQGPUS1/r3He+/Mlexvh81x0FB/BwZRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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