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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e96d05a9747a7529cf6e2f8ce9df39825d4828bfd7fb861ac58adc11a99b62bd' 
  AND token = 'qppKYU0/LK2enrVMDI6ePmT1bR5cn5PuLVGKw1Yr0ME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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