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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c0345007ba53671239cf2fa5cd8b8eb980a8ac4ea3f8c25dc5e3964c32fdd29e' 
  AND token = 'NcvCoyw6UFblX85VL25wvVsrS/chfEzJZXcF3dgrR7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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