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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e7d4eba69b293e96fb99e4e19166bec69c995aa6802a0b625ceca7daf727a02' 
  AND token = 'SRYR6R4dD0fLxuyMWUFN6eeKG2rueJD/dziVBu2lDDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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