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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '007db9dff7a4e6b14fc23aa87c0b765bbfc8902852265c6f33b4f3f991bcca2e' 
  AND token = 'SkvTjl56I74KnSAU0Fu/3Rc18AHPFthunUNNE/aWePo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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