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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '747f1b27114c1ba7a23cf98a269564c11ea3694612c556d67a7996de5ec01ce1' 
  AND token = 'X+mw1D2CVPO/rSZzGD+4oEIdGuf/dG2BTlX06u76cCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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